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fxlink: add (unused) scale parameter to SDL2 video capture

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Lephenixnoir 2024-01-21 21:05:36 +01:00
parent 9f4d17ca4f
commit 45fd52444f
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GPG key ID: 1BBA026E13FC0495
1 changed files with 24 additions and 8 deletions
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32
fxlink/tooling/sdl2.c
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@ -46,18 +46,31 @@ static void quit(void)
/* Generate an RGB888 surface from image data. */ /* Generate an RGB888 surface from image data. */
static SDL_Surface *surface_for_image(uint8_t **RGB888_rows, int width, static SDL_Surface *surface_for_image(uint8_t **RGB888_rows, int width,
int height) int height, int scale)
{ {
/* Little endian setup for RGB */ /* Little endian setup for RGB */
SDL_Surface *s = SDL_CreateRGBSurface(0, width, height, 24, SDL_Surface *s = SDL_CreateRGBSurface(0, width*scale, height*scale, 24,
0x000000ff, 0x0000ff00, 0x0000ff00, 0); 0x000000ff, 0x0000ff00, 0x0000ff00, 0);
if(!s) { if(!s) {
elog("cannot create surface for image\n"); elog("cannot create surface for image\n");
return NULL; return NULL;
} }
for(int i = 0; i < height; i++) for(int y = 0; y < height; y++) {
memcpy(s->pixels + i * s->pitch, RGB888_rows[i], width * 3); for(int dy = 0; dy < scale; dy++) {
uint8_t *src = RGB888_rows[y];
uint8_t *dst = s->pixels + (y*scale+dy) * s->pitch;
for(int x = 0; x < width; x++) {
for(int dx = 0; dx < scale; dx++) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst += 3;
}
src += 3;
}
}
}
return s; return s;
} }
@ -68,11 +81,14 @@ void fxlink_sdl2_display_raw(struct fxlink_message_image_raw const *raw)
return; return;
int current_w, current_h; int current_w, current_h;
SDL_GetWindowSize(window, &current_w, &current_h); int scale = 1;
if(current_w != raw->width || current_h != raw->height)
SDL_SetWindowSize(window, raw->width, raw->height);
SDL_Surface *src = surface_for_image(raw->data, raw->width, raw->height); SDL_GetWindowSize(window, &current_w, &current_h);
if(current_w != raw->width * scale || current_h != raw->height * scale)
SDL_SetWindowSize(window, raw->width * scale, raw->height * scale);
SDL_Surface *src =
surface_for_image(raw->data, raw->width, raw->height, scale);
if(!src) if(!src)
return; return;